package com.example.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.reggie.common.R;
import com.example.reggie.dto.DishDto;
import com.example.reggie.entity.Category;
import com.example.reggie.entity.Dish;
import com.example.reggie.entity.DishFlavor;
import com.example.reggie.service.CategoryService;
import com.example.reggie.service.DishFlavorService;
import com.example.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 添加菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //精确清理
        Set key = redisTemplate.keys("dish_" + dishDto.getCategoryId() + "_1");
        redisTemplate.delete(key);
        return R.success("菜品添加成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> pageR(int page, int pageSize, String name) {
        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);
        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            //分类id
            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                dishDto.setCategoryName(category.getName());
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 查询菜品基本信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 更新菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //精确清理
        Set key = redisTemplate.keys("dish_" + dishDto.getCategoryId() + "_1");
        redisTemplate.delete(key);

        return R.success("菜品信息修改成功");
    }

    /**
     * 改变菜品状态
     * @param state
     * @param ids
     * @return
     */
    @PostMapping("/status/{state}")
    public R<String> modifyStatus(@PathVariable int state, @RequestParam List<Long> ids) {
        //创建条件查询器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加id批量查询条件
        queryWrapper.in(Dish::getId, ids);
        //批量查询
        List<Dish> dishes = dishService.list(queryWrapper);
        //批量改变dishes状态
        dishes.stream().map((item) -> {
            item.setStatus(state);
            return item;
        }).collect(Collectors.toList());

        //批量更新
        dishService.updateBatchById(dishes);

        //清理缓存
        for (Dish dish : dishes) {
            //精确清理
            Set key = redisTemplate.keys("dish_" + dish.getCategoryId() + "_1");
            redisTemplate.delete(key);
        }

        return R.success("状态修改成功");
    }

    /**
     * 删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        dishService.deleteWithFlavor(ids);
        return R.success("删除菜品成功");
    }

    /**
     * 根据条件查询对应菜品数据
     * @param dish
     * @return
     */
//    @GetMapping("/list")
//    public R<List<Dish>> listR(Dish dish) {
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        //查询条件
//        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
//        //查询起售状态的菜品
//        queryWrapper.eq(Dish::getStatus, 1);
//        //排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//        //查询
//        List<Dish> list = dishService.list(queryWrapper);
//
//        return R.success(list);
//    }

    /**
     * 根据条件查询对应菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> listR(Dish dish) {

        List<DishDto> dishDtoList = null;

        //自己构建key
        String key = "dish_" + dish.getCategoryId() +"_" +dish.getStatus();

        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if (dishDtoList != null)
            //如果存在，直接返回不需要查询数据库
            return R.success(dishDtoList);

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //查询条件
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //查询起售状态的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        //查询
        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            //分类id
            Long categoryId = item.getCategoryId();
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                dishDto.setCategoryName(category.getName());
            }

            //根据id查询口味数据
            Long id = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, id);
            List<DishFlavor> flavors = dishFlavorService.list(lambdaQueryWrapper);

            dishDto.setFlavors(flavors);

            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，查询数据库,将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }
}
